mirror of https://github.com/tfussell/xlnt
254 lines
8.5 KiB
C++
254 lines
8.5 KiB
C++
// Copyright (c) 2014-2021 Thomas Fussell
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// Copyright (c) 2010-2015 openpyxl
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE
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//
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// @license: http://www.opensource.org/licenses/mit-license.php
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// @author: see AUTHORS file
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#pragma once
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#include <cstddef>
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#include <iterator>
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#include <xlnt/xlnt_config.hpp>
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namespace xlnt {
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class workbook;
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class worksheet;
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// Note: There are const and non-const implementations of this iterator
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// because one needs to point at a const workbook and the other needs
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// to point at a non-const workbook stored as a member variable, respectively.
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/// <summary>
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/// An iterator which is used to iterate over the worksheets in a workbook.
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/// </summary>
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class XLNT_API worksheet_iterator
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{
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public:
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/// <summary>
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/// iterator tags required for use with standard algorithms and adapters
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/// </summary>
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using iterator_category = std::bidirectional_iterator_tag;
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using value_type = worksheet;
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using difference_type = std::ptrdiff_t;
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using pointer = worksheet *;
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using reference = worksheet; // intentionally value
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/// <summary>
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/// Default Constructs a worksheet iterator
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/// </summary>
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worksheet_iterator() = default;
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/// <summary>
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/// Constructs a worksheet iterator from a workbook and sheet index.
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/// </summary>
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worksheet_iterator(workbook &wb, std::size_t index);
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/// <summary>
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/// Copy constructs a worksheet iterator from another iterator.
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/// </summary>
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worksheet_iterator(const worksheet_iterator &) = default;
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/// <summary>
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/// Copy assigns the iterator so that it points to the same worksheet in the same workbook.
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/// </summary>
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worksheet_iterator &operator=(const worksheet_iterator &) = default;
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/// <summary>
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/// Move constructs a worksheet iterator from a temporary iterator.
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/// </summary>
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worksheet_iterator(worksheet_iterator &&) = default;
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/// <summary>
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/// Move assign the iterator from a temporary iterator
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/// </summary>
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worksheet_iterator &operator=(worksheet_iterator &&) = default;
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/// <summary>
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/// Default destructor
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/// </summary>
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~worksheet_iterator() = default;
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/// <summary>
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/// Dereferences the iterator to return the worksheet it is pointing to.
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/// If the iterator points to one-past-the-end of the workbook, an invalid_parameter
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/// exception will be thrown.
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/// </summary>
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reference operator*();
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/// <summary>
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/// Dereferences the iterator to return the worksheet it is pointing to.
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/// If the iterator points to one-past-the-end of the workbook, an invalid_parameter
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/// exception will be thrown.
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/// </summary>
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const reference operator*() const;
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/// <summary>
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/// Returns true if this iterator points to the same worksheet as comparand.
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/// </summary>
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bool operator==(const worksheet_iterator &comparand) const;
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/// <summary>
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/// Returns true if this iterator doesn't point to the same worksheet as comparand.
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/// </summary>
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bool operator!=(const worksheet_iterator &comparand) const;
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/// <summary>
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/// Post-increment the iterator's internal workseet index. Returns a copy of the
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/// iterator as it was before being incremented.
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/// </summary>
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worksheet_iterator operator++(int);
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/// <summary>
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/// Pre-increment the iterator's internal workseet index. Returns a refernce
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/// to the same iterator.
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/// </summary>
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worksheet_iterator &operator++();
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/// <summary>
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/// Post-decrement the iterator's internal workseet index. Returns a copy of the
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/// iterator as it was before being incremented.
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/// </summary>
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worksheet_iterator operator--(int);
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/// <summary>
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/// Pre-decrement the iterator's internal workseet index. Returns a refernce
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/// to the same iterator.
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/// </summary>
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worksheet_iterator &operator--();
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private:
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/// <summary>
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/// The target workbook of this iterator.
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/// </summary>
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workbook *wb_ = nullptr;
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/// <summary>
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/// The index of the worksheet in wb_ this iterator is currently pointing to.
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/// </summary>
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std::size_t index_ = 0;
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};
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/// <summary>
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/// An iterator which is used to iterate over the worksheets in a const workbook.
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/// </summary>
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class XLNT_API const_worksheet_iterator
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{
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public:
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/// <summary>
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/// iterator tags required for use with standard algorithms and adapters
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/// </summary>
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using iterator_category = std::bidirectional_iterator_tag;
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using value_type = const worksheet;
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using difference_type = std::ptrdiff_t;
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using pointer = const worksheet *;
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using reference = const worksheet; // intentionally value
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/// <summary>
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/// Default Constructs a worksheet iterator
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/// </summary>
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const_worksheet_iterator() = default;
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/// <summary>
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/// Constructs a worksheet iterator from a workbook and sheet index.
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/// </summary>
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const_worksheet_iterator(const workbook &wb, std::size_t index);
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/// <summary>
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/// Copy constructs a worksheet iterator from another iterator.
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/// </summary>
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const_worksheet_iterator(const const_worksheet_iterator &) = default;
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/// <summary>
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/// Copy assigns the iterator so that it points to the same worksheet in the same workbook.
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/// </summary>
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const_worksheet_iterator &operator=(const const_worksheet_iterator &) = default;
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/// <summary>
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/// Move constructs a worksheet iterator from a temporary iterator.
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/// </summary>
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const_worksheet_iterator(const_worksheet_iterator &&) = default;
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/// <summary>
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/// Move assigns the iterator from a temporary iterator
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/// </summary>
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const_worksheet_iterator &operator=(const_worksheet_iterator &&) = default;
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/// <summary>
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/// Default destructor
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/// </summary>
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~const_worksheet_iterator() = default;
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/// <summary>
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/// Dereferences the iterator to return the worksheet it is pointing to.
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/// If the iterator points to one-past-the-end of the workbook, an invalid_parameter
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/// exception will be thrown.
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/// </summary>
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const reference operator*() const;
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/// <summary>
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/// Returns true if this iterator points to the same worksheet as comparand.
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/// </summary>
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bool operator==(const const_worksheet_iterator &comparand) const;
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/// <summary>
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/// Returns true if this iterator doesn't point to the same worksheet as comparand.
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/// </summary>
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bool operator!=(const const_worksheet_iterator &comparand) const;
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/// <summary>
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/// Post-increment the iterator's internal workseet index. Returns a copy of the
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/// iterator as it was before being incremented.
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/// </summary>
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const_worksheet_iterator operator++(int);
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/// <summary>
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/// Pre-increment the iterator's internal workseet index. Returns a refernce
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/// to the same iterator.
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/// </summary>
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const_worksheet_iterator &operator++();
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/// <summary>
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/// Post-decrement the iterator's internal workseet index. Returns a copy of the
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/// iterator as it was before being incremented.
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/// </summary>
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const_worksheet_iterator operator--(int);
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/// <summary>
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/// Pre-decrement the iterator's internal workseet index. Returns a refernce
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/// to the same iterator.
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/// </summary>
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const_worksheet_iterator &operator--();
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private:
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/// <summary>
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/// The target workbook of this iterator.
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/// </summary>
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const workbook *wb_ = nullptr;
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/// <summary>
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/// The index of the worksheet in wb_ this iterator is currently pointing to.
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/// </summary>
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std::size_t index_ = 0;
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};
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} // namespace xlnt
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